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/************************************************************************
************************************************************************
FAUST compiler
Copyright (C) 2003-2018 GRAME, Centre National de Creation Musicale
---------------------------------------------------------------------
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
************************************************************************
************************************************************************/
#ifndef __PATTERNMATCHER__
#define __PATTERNMATCHER__
#include <vector>
#include "tlib.hh"
namespace PM {
struct Automaton;
/* Create a pattern matching automaton from the given list of rules. */
Automaton* make_pattern_matcher(Tree R);
/* Apply the pattern matcher to a single argument, starting from a given state
s. Returns the resulting state, modifies the variable bindings E
accordingly, and sets C to the resulting closure if a final state is
reached. Result will be -1 to indicate a matching failure, and C will be
set to nil if no final state has been reached yet. */
int apply_pattern_matcher(Automaton* A, // automaton
int s, // start state
Tree X, // arg to be matched
Tree& C, // output closure (if any)
std::vector<Tree>& E); // modified output environments
}
#endif
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